Picture clock



FIG. 1 is a left front perspective view of a picture clock showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right rear perspective view thereof.

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design of a picture clock, substantially as shown and described. 